Weather on September 26
San Bernardino, CA
55 Years of Data
Avg High
89°F
Avg Low
61°F
Warmest
1978
87°F avg
Coldest
1998
63°F avg
About This Date
September 26th in San Bernardino, CA typically brings warm fall weather, with average highs around 89°F and lows near 61°F — a 28°F daily swing. Over 48 years of records, the warmest September 26th was in 1978 (87°F average), while the coldest was 1998 (63°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 4% of September 26th dates historically, with the wettest September 26th recording 2.41" of rain.
Planning for September 26th in San Bernardino, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 81° | 64° | 72° | — | — |
| 2017 | 84° | 64° | 74° | — | — |
| 2016 | 94° | 76° | 85° | — | — |
| 2015 | 97° | 73° | 85° | — | — |
| 2014 | 88° | 66° | 77° | — | — |
| 2013 | 72° | 57° | 64° | — | — |
| 2012 | 89° | 56° | 72° | — | — |
| 2011 | 83° | 56° | 69° | — | — |
| 2010 | 108° | 63° | 85° | — | — |
| 2009 | 108° | 64° | 86° | — | — |
| 2008 | 97° | 63° | 80° | — | — |
| 2007 | 95° | 55° | 75° | — | — |
| 2006 | 92° | 56° | 74° | — | — |
| 2005 | 95° | 47° | 71° | — | — |
| 2004 | 99° | 58° | 78° | — | — |
| 2003 | 92° | 58° | 75° | — | — |
| 2002 | 90° | 63° | 76° | — | — |
| 2001 | 102° | 66° | 84° | — | — |
| 2000 | 94° | 55° | 74° | — | — |
| 1999 | 90° | 50° | 70° | — | — |
| 1998coldest | 71° | 55° | 63° | — | — |
| 1997 | 79° | 67° | 73° | 0.3" | — |
| 1996 | 79° | 58° | 68° | — | — |
| 1995 | 85° | 56° | 70° | — | — |
| 1994 | 90° | 65° | 77° | — | — |
| 1993 | 100° | 57° | 79° | — | — |
| 1992 | 99° | 65° | 82° | — | — |
| 1991 | 95° | 66° | 81° | — | — |
| 1990 | 81° | 56° | 68° | — | — |
| 1989 | 97° | 66° | 81° | — | — |
| 1988 | 82° | 55° | 69° | — | — |
| 1987 | 86° | 62° | 74° | — | — |
| 1986 | 69° | 67° | 68° | — | — |
| 1985 | 75° | 69° | 72° | — | — |
| 1984 | 97° | 60° | 78° | — | — |
| 1983 | 84° | 65° | 74° | — | — |
| 1982 | — | 65° | — | 2.41" | — |
| 1981 | 89° | 54° | 71° | — | — |
| 1980 | 99° | 58° | 78° | — | — |
| 1979 | 98° | 61° | 79° | — | — |
| 1978warmest | 107° | 66° | 87° | — | — |
| 1977 | 81° | 61° | 71° | — | — |
| 1976 | 72° | 63° | 67° | — | — |
| 1975 | 97° | 58° | 77° | — | — |
| 1974 | 81° | 60° | 70° | — | — |
| 1973 | 94° | 61° | 77° | — | — |
| 1972 | 83° | 57° | 70° | — | — |
| 1971 | 76° | 58° | 67° | — | — |
48 years of data from NORTON AFB